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NPE-S2 Standard



Navien NPE-S2 our standard ultra high efficiency tankless with higher performance and technology

When it comes to water heater’s all about
the output

The NPE-S2 condensing tankless water heaters are so efficient that they outperform much larger capacity non-condensing competitors. More output for the money, lower installation costs and lower operating costs for customers making it the best choice for your next installation.



Navien...the proven leader in condensing tankless, makes it even easier to install and set up with the new NPE-S2 series


2" PVC up to 75 feet and 1/2" gas up to 24 feet


High efficiency up to 0.96 UEF and up to 15:1 TDR


Durable dual stainless steel heat exchangers


EZNav™ multi-line control with built-in intuitive software

Cascading up to 32 units and common vent up to 12 units

Cascade up to 32 units with Navien Ready-Link® technology.

With Navien's Ready-Link® cascading technology, when a unit gets up to 80% capacity the next unit will turn on to help meet requirements. The flow on demand ratio will continue until all 32 units are generating hot water as needed. The Navien cascading system also balances out the workload of each unit for longer life.

Common vent
up to 12 units

Building penetrations are reduced with Navien's common venting feature.

Multi-line control with built-in intuitive software 

Navien’s new backlit EZNav™ control panel uses simple text and icons to make set up, operation status and troubleshooting faster and easier than ever before.

  • Self-diagnostics.
  • Displays temperature and water flow rate.
  • Displays status of cascade operation.
  • Convertible display from °F to °C.
  • User Friendly Interface.
  • Easy setup.

NPE-S2 Models

Max Input: 120,000 BTU/h
Indoor or outdoor wall-hung
Navien NPE-150S2 condensing tankless water heaters
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Max Input: 150,000 BTU/h
Indoor or outdoor wall-hung
Navien NPE-180S2 condensing tankless water heaters
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Max Input: 180,000 BTU/h
Indoor or outdoor wall-hung
Navien NPE-210S2 condensing tankless water heaters
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Max Input: 199,900 BTU/h
Indoor or outdoor wall-hung
Navien NPE-240S2 condensing tankless water heaters
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Optional Wi-Fi remote control systems


NaviLink & NaviLink Lite make it easy to communicate with your Navien systems anywhere internet service is accessible. The NaviLink system attaches easily to any new or existing* Navien tankless water heater, combi‐boiler and boiler. NaviLink Lite is great for single residential units and magnetically mounts to the side of the unit or can easily be mounted on the wall. Also, NaviLink Lite does not require external power.

* Existing installations may require the purchase of a new main PCB and front control panel. 

Click here to learn more about NaviLink

Available for Download
on IOS or Android

Ready-Link® Manifold System for mounting on a wall or rack

  • Simply no waiting for custom racks
  • Simply easy to install...same day.
  • Simply more profitable.
  • Simply visit your local Navien wholesaler and pick up everything you need.
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